318 pulley mistake, need the correct size.

Ant said
Update!

Got the pulley and it fits.
Now I think I should get a fan clutch instead of having a fan mechanically bolted to the water pump.

View attachment 1716277086

I use a fan clutch on my 340 (which is a stock set-up). You have a non - AC set-up, so you will need a non-AC clutch. Non-thermal.